CN102778814B - Photo-sensitive composition containing ketoximes ester type photoinitiator and application thereof - Google Patents
Photo-sensitive composition containing ketoximes ester type photoinitiator and application thereof Download PDFInfo
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Abstract
The invention relates to a photo-sensitive composition which contains special ketoxime ester type photoinitiator, alkali soluable resin, dipentaerythritol hexaacrylate and colorant. The composition is weak in smell, has excellent storage stability and high photocuring activity, generates no toxic and harmful substances and is high in using safety. The prepared membrane is flat in border, free of defect and dross and good in the whole pattern integrity and has no cockle on the surface.
Description
Technical field
The present invention relates to a kind of photosensitive composite and the application in manufacturing colored filter thereof, belong to photocuring technology field.
Background technology
The colored filter of one of liquid crystal display core parts comprises redness (R), green (G), blue (B) macromolecular material and black matrix" (BM), wherein red, green, blue three parts are called for short RGB, and in prior art, RGB and BM are prepared from by photocuring technology.The core of photocuring technology is photosensitive composite.
At present, along with the fast development of microelectric technique and growing industry requirement, research and report for photosensitive composite are also more and more many, for example document CN1221129A, WO2006/006671A1, CN1818779A, CN1337013A, CN1952779A.But, microelectric technique is maked rapid progress, its requirement to element is also more and more higher, simultaneously, control to objectionable impurities in the security of manual operation environment and manufacturing process is more and more stricter, therefore not only need photopolymerizable composition to there is higher usability, its safety in utilization is also had to higher requirement, and existing composition can not meet day by day urgent application demand simultaneously.
Given this, the present invention discloses a kind of photosensitive composite, and it has shown very excellent performance at aspects such as safety in utilization, storage stability, developability, the anti-surperficial wrinkle of formed film.
Summary of the invention
The invention provides a kind of photosensitive composite, it contains specific ketoxime ester compound as Photoepolymerizationinitiater initiater.Said composition smell is low, storage stability is high, photolytic product toxicity is low; In photocuring application, curing rate is fast, exposure efficiency is high, of low pollution, does not produce benzene class noxious material, and the picture pattern of curing molding is meticulous complete simultaneously, there is no defect and scum silica frost.
Concrete technical scheme of the present invention is as follows:
A photosensitive composite, is characterized in that, comprises following component:
(A) light trigger of 1-8 mass parts, structure ketoxime ester compound as shown in the formula (I)
R wherein
1structure is
the integer that wherein n is 1～4, the integer that m is 1～6;
R
2for the cycloalkyl-alkyl that there is the alkyl of 2～10 carbon atoms or the naphthenic base of 3～8 carbon atoms or formed by the alkyl of 1～4 carbon and the naphthenic base of 3～8 carbon;
(B) alkali soluble resins of 20-60 mass parts, this alkali soluble resins is mainly the acryl resin that a class contains carboxyl, preferably the polymkeric substance of at least one monomer in methyl methacrylate, benzyl methacrylate, methacrylic acid, acrylic acid, hydroxyethyl methylacrylate, hydroxy propyl methacrylate, glycidyl methacrylate, methacrylic acid 2-ethyl isocyanate, methacrylic acid 2-propyl isocyanate;
Preferably, this acryl resin can be by above-mentioned monomer and styrene copolymerized forming;
Or this acryl resin can and as follows form containing fluorene structured acrylate monomer copolymerization by above-mentioned monomer:
(C) dipentaerythritol acrylate of 10-50 mass parts;
(D) colorant of 10-30 mass parts.
As component (A), the ketoxime ester compound shown in formula (I) is used as Photoepolymerizationinitiater initiater in the present invention, the preferred 2.5-6.5 mass parts of its content, more preferably 3.5-5.5 mass parts, most preferably 5-5.5 mass parts.
In photosensitive polymer combination, alkali soluble resins, usually used as by film-forming material, also can for example, participate in photopolymerization reaction by the polymerism functional group (ethene unsaturated group) of self in Light Curing.In composition of the present invention, the alkali soluble resins of component (B) is preferably prepared from by conventional copolyreaction by four kinds of monomers of acrylate shown in benzyl methacrylate, methacrylic acid, hydroxyethyl methylacrylate and formula (II), the preferred 55:10:15:10 of each monomer mole ratio wherein, the preferred 5000-15000 of multipolymer weight-average molecular weight, more preferably 10000-15000.Consideration based on factors such as light sensitivity, developability, sharpness, the preferred 25-40 mass parts of the content of this alkali soluble resins in photosensitive composite, more preferably 30-35 mass parts.
The dipentaerythritol acrylate of component (C) is a kind of multi-functional photo polymerization monomer.For film strength and the consideration to substrate adhesion, in photosensitive composite of the present invention, the preferred 15-30 mass parts of its content.
In photosensitive composite of the present invention, the effect of colorant is mainly painted, can be dyestuff and pigment, preferred pigments (comprising organic pigment and inorganic pigment), particularly preferably color index (C.I.; The Society of Dyers and Colourists distribution) in, be categorized as the compound of pigment, if color index is the material of C.I. pigment yellow, C.I. pigment orange, C.I. pigment violet, C.I. paratonere, C.I. alizarol saphirol, C.I. naphthol green, C.I. bistre, C.I. pigment black etc.Can also enumerate carbon black, titanium is black, the inorganic pigments such as the oxide of the metals such as copper, subsides, manganese, calcium, composite oxides, metal sulfide, metal sulfate or metal carbonate.In the present invention, as the colorant of component (D), there is no particular limitation, can carry out suitable selection according to the purposes of photosensitive composite.For example, while preparing black matrix" BM, as black pigment, preferably use carbon black, as channel black, furnace black, the known carbon black such as dim.In photosensitive composite of the present invention, inorganic pigment and organic pigment can be used separately, also can be used together two or more.The preferred 10-20 mass parts of content of colorant, more preferably 15-18 mass parts.
Except above-mentioned four class components, photosensitive composite of the present invention can optionally contain adjuvant as required.Specifically can enumerate spreading agent (surfactant), antioxidant, photosensitizer, filling agent, bonding agent etc.
In addition, in photosensitive composite of the present invention, can also add the solvent for diluting, while particularly needing said composition for coating process.As addible solvent, for example can enumerate (gathering) alkylene glycol monoalkyl ethers such as ethylene glycol monoethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, dipropylene glycol monomethyl ether, DPE, dipropylene glycol list positive propyl ether, dipropylene glycol mono-n-butyl ether, Tripropylene glycol monomethyl Ether, tripropylene glycol list ether; (gathering) alkylene glycol monoalky lether acetate esters such as ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, diethylene glycol monomethyl ether acetic acid esters, diethylene glycol monoethyl ether acetic acid esters, propylene glycol methyl ether acetate, propylene glycol monoethyl ether acetate; The lactic acid alkyl ester classes such as 2 hydroxy propanoic acid methyl esters, 2 hydroxy propanoic acid ethyl ester; Other ester classes such as 2-hydroxy-2-methyl ethyl propionate, ethyl acetate, n-propyl acetate, isopropyl acetate, n-butyl acetate, isobutyl acetate, formic acid n-pentyl ester, isoamyl acetate, n-butyl propionate, ethyl butyrate, propyl butyrate, isopropyl isobutyrate, the positive butyl ester of butyric acid, methyl pyruvate, ethyl pyruvate, pyruvic acid n-propyl, methyl acetoacetate, ethyl acetoacetate, 2-oxygen base ethyl butyrate etc.These solvents can be used separately or two or more mixes use.Dispersed consideration based on to the dissolubility of resene component, photopolymerization monomer, Photoepolymerizationinitiater initiater and insoluble colorant component, is particularly preferably used propylene glycol methyl ether acetate, 2 hydroxy propanoic acid ethyl ester.With respect to the total amount of 100 mass parts components (A)-(D), solvent can be used in the scope of 50-500 mass parts, preferably 100-200 mass parts.
Photosensitive composite of the present invention can be prepared from by each component of even mixing, and mixing can realize by method known in the field, for example, use stirring machine to stir.
The present invention also aims to provide the application of above-mentioned photosensitive composite in preparing colored filter.
Useful technique effect of the present invention comprises:
Photosensitive composite of the present invention has very excellent storage stability and very high photocuring activity, and under low exposure dose, composition is splendid with regard to energy crosslinking curing and solidification effect, and Light Curing does not produce poisonous and harmful substances, safe to use.The smooth zero defect of film edge making, does not have scum silica frost, and whole pattern integrity degree is good, and surface does not have wrinkle, and the colored filter optical clarity of making is high, not light leak.And wonderful discovery, in composition, each component has shown extraordinary cooperation/cooperative effect.Formula (I) compound as Photoepolymerizationinitiater initiater when being used in conjunction with other component shown in the present, shown the combination property that is much better than other classification light trigger, the aspects such as the surperficial anti-crease property of the outstanding smell that shows photosensitive composite, storage stability, developability, formed film, safety in utilization.
Specific implementation method
Below, by by the manufacturing process of black matrix" in colored filter and colored filter film, specifically describe the performance of the present composition.Should be understood that, embodiment is only for better understanding the present invention, and should not be construed as limitation of the present invention.
[preparation of optical filter]
Use photosensitive composite, by photocuring and photoetching process, prepare the technology of colored filter and by those skilled in the art, known.Generally include following steps:
I) photosensitive composite is dissolved in for example, in suitable organic solvent (propylene glycol monomethyl ether acetate and/or 2 hydroxy propanoic acid ethyl ester), obtains liquid composition;
Ii) utilize coating machine, such as rotary coating machine, the excellent coating machine that winds the line, axle coating machine or spray coating machine etc., is uniformly coated on liquid composition on substrate;
Iii) carry out front baking dry dry, except desolventizing;
Iv) mask plate is attached on sample and is exposed, develop and remove unexposed area subsequently;
V) carry out rear baking, obtain having the photoresist dry film of desired shape.
The photoresist film that contains black pigment is exactly black matrix" BM; and by same process for photocuring, add RGB(red, green, blue three looks on BM); just can form the key component chromatic photoresist of chromatic filter, add diaphragm and ITO nesa coating just can be made into colored filter.
According to shown in following table, fill a prescription, prepare six groups of different photosensitive composites.
In each composition, raw materials is described as follows:
Acryl resin: benzyl methacrylate/methacrylic acid/methyl methacrylate (mol ratio is 50/15/30) multipolymer (Mw:15000)
Reactive diluent: dipentaerythritol acrylate
Light trigger:
Embodiment 1: formula (I), R
1middle n=1, m=3, R
2it is trimethylene base
Embodiment 2: formula (I), R
1middle n=1, m=4, R
2it is trimethylene base
Embodiment 3: formula (I), R
1middle n=1, m=3, R
2it is cyclohexyl
Embodiment 4: formula (I), R
1middle n=1, m=4, R
2it is n-hexyl
Comparative example 1:1-(4-thiophenyl phenyl)-(3-cyclopentyl propane)-1,2-diketone-2-oxime-benzoic ether (CN101565472A)
Comparative example 2:2-phenyl-2-dimethylamino-1-(4-morpholinyl phenyl)-butanone-1 (Irgacure369) pigment:
Embodiment 1: carbon black
Embodiment 2: carbon black
Embodiment 3:C.I. paratonere 254
Embodiment 4:C.I. alizarol saphirol-15:3
Comparative example 1: carbon black
Comparative example 2:C.I. alizarol saphirol-15:3
According to the mixed preparing photosensitive composite of filling a prescription shown in above-mentioned table, and be dissolved in the solvent propylene glycol monomethyl ether acetate (PGMEA) of 100 mass parts, form fluid composition;
Utilize rotary coating machine that fluid composition is coated on glass substrate, at 90 ℃, dry 5min is except desolventizing, and forming thickness is filming of 1.5 μ m; For obtaining filming of above-mentioned thickness, coating procedure can be once to complete also to carry out several times;
By being formed with the substrate of filming, be cooled to room temperature, enclose mask plate, with high-pressure sodium lamp (exposure energy 150mJ/cm
2), by the gap of mask plate, in the ultraviolet ray of 365nm, 405nm and 436nm wavelength, to filming, expose;
At the temperature of 25 ℃, use 1% NaOH aqueous solution development, then with ultrapure water washing, air-dry;
Finally, in the baking oven of 220 ℃, rear baking 30min, obtains the pattern that mask plate shifts.
The surperficial anti-crease property of the storage stability of above-mentioned six groups of compositions, smell, developability, formed film and safety in utilization (toxicity) are evaluated respectively and are compared, and result is as follows:
performance evaluation
| Storage stability | Smell | Developability | Surface wrinkle | Toxicity | |
| Embodiment 1 | ○ | ○ | ○ | ○ | ○ |
| Embodiment 2 | ○ | ○ | ○ | ○ | ○ |
| Embodiment 3 | ○ | ○ | ○ | ○ | ○ |
| Embodiment 4 | ○ | ○ | ○ | ○ | ○ |
| Comparative example 1 | ○ | × | △ | ○ | × |
| Comparative example 2 | △ | △ | × | × | △ |
Zero: good especially △: slightly good *: bad
Note: the toxicity of composition mainly comes from the small-molecule substance that light trigger photodissociation produces, wherein embodiment 1 ~ 4 mainly produces cycloalkane material, comparative example 1 produces benzene, comparative example 2 produces organic amine material, the toxicity of benzene very large (rat oral LD50:3306mg/kg) wherein, other material toxicity is relatively much smaller.
Wherein, the detection method that photodissociation produces small-molecule substance is to get the 50g compound composition of embodiment 1-4 and comparative example 1 and comparative example 2, carries out uv-exposure 5 minutes, exposure energy 150mJ/cm in dark box type exposure machine
2, it is 1cm that cured film is shredded into particle diameter with scissors
3following particle.Get above-mentioned cured granulate 5g, in airtight glassware, with 20g acetonitrile, soak 24h, then acetonitrile solution is carried out to GC-MS analysis, analysis result sees the following form:
From above performance evaluation with relatively can find out, a little less than photosensitive composite smell of the present invention, there is very excellent storage stability and very high photocuring active, and do not produce poisonous and harmful substances, safe to use.The smooth zero defect of film edge making, does not have scum silica frost, and whole pattern integrity degree is good, and surface does not have wrinkle.Generally speaking, compositions display of the present invention is except extremely excellent application performance.
Claims (6)
1. a photosensitive composite, comprises following component:
(A) light trigger of 1-8 mass parts,
(B) alkali soluble resins of 20-60 mass parts,
(C) dipentaerythritol acrylate of 10-50 mass parts,
(D) colorant of 10-30 mass parts;
It is characterized in that:
Light trigger as component (A) is ketoxime ester compound as shown in the formula (I)
Wherein,
R
1structure is
n=1 wherein, m is 3 or 4;
R
2for thering is the naphthenic base of 3～8 carbon atoms;
Alkali soluble resins as component (B) is benzyl methacrylate/methacrylic acid/methylmethacrylate copolymer, and wherein the mol ratio of benzyl methacrylate, methacrylic acid and methyl methacrylate is 50:15:30, and the Mw of multipolymer is 15000.
2. photosensitive composite claimed in claim 1, is characterized in that: as the ketoxime ester compound content shown in the formula (I) of component (A), be 5-5.5 mass parts.
3. photosensitive composite claimed in claim 1, is characterized in that: the content as the alkali soluble resins of component (B) is 25-40 mass parts.
4. photosensitive composite claimed in claim 1, is characterized in that: the dipentaerythritol acrylate content as component (C) is 15-30 mass parts.
5. photosensitive composite claimed in claim 1, is characterized in that: the content as the colorant of component (D) is 10-20 mass parts.
6. the application of photosensitive composite in preparing colored filter described in any one in claim 1-5.
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| KR101968510B1 (en) * | 2013-02-06 | 2019-04-12 | 동우 화인켐 주식회사 | Photosensitive resin composition for forming red pixel pattern |
| CN103130919B (en) | 2013-02-08 | 2015-02-25 | 常州强力先端电子材料有限公司 | Carbazole ketone oxime ester high-photosensibility photoinitiator |
| KR101852509B1 (en) * | 2013-03-15 | 2018-04-26 | 동우 화인켐 주식회사 | Colored photosensitive resin composition |
| CN103293855B (en) * | 2013-05-20 | 2015-12-23 | 常州强力先端电子材料有限公司 | A kind of esters of acrylic acid Photocurable composition |
| CN103819583B (en) * | 2014-03-18 | 2016-05-18 | 常州强力电子新材料股份有限公司 | A kind of containing two oxime ester lightlike initiating agents of nitro and its preparation method and application |
| CN109476580A (en) * | 2016-07-21 | 2019-03-15 | 三菱瓦斯化学株式会社 | Compound, resin, composition and pattern forming method |
| JP7194355B2 (en) * | 2016-07-21 | 2022-12-22 | 三菱瓦斯化学株式会社 | Compound, resin, composition and pattern forming method |
| EP3587385A4 (en) * | 2017-02-23 | 2021-02-24 | Mitsubishi Gas Chemical Company, Inc. | Compound, resin, composition, pattern forming method and purification method |
| TWI766941B (en) * | 2017-03-31 | 2022-06-11 | 南韓商東友精細化工有限公司 | Blue photosensitive resin composition and color filter and image display device manufactured using the same |
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| JP2007286482A (en) * | 2006-04-19 | 2007-11-01 | Fujifilm Corp | Photosensitive composition, photosensitive film, permanent pattern forming method and printed circuit board |
| CN101565472B (en) * | 2009-05-19 | 2011-05-04 | 常州强力电子新材料有限公司 | Ketoxime ester photoinitiator |
| CN101923287B (en) * | 2010-08-31 | 2011-11-30 | 常州强力电子新材料有限公司 | Photosensitive composition containing photoinitiator of diphenyl sulfide based ketoxime esters and application thereof |
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